Alexandru Petrescu , Jun 09, 2005; 07:57 a.m.
Dan, I'm doing that for myself (scan 35mm to DVD).
I see DVD as two different matters. One is as a temporary support (3-5 years) for the scan outputs, readable with a PC. Another matter is an even more ephemeral "production" DVD that I distribute to people that watch it as a show on TV. The "support" DVDs hold only about 12 slides and the "production" DVD can hold much more, with proper sequencing, music and show.
As such, HDTV being high quality or low quality is a separated issue. Whatever HDTV and projector claim as resolution today it is very far from common slide resolving power and black color. HDTV and digital projector will not reach the high quality of projecting a color slide with a light source soon. But, in the near future (10-20 years you mention) one would be able to copy the files from the "support" DVD and make "production" DVDs that will have more capacity at that time and potentially projected through more advanced digital projectors.
My two cents worth.